Siemens' 110 lb world-record electric aircraft motor produce 348 hp at 2,500 RPM

On Saturday, November 14, 2015 at 11:20:42 PM UTC-5, wrote:
On Saturday, November 14, 2015 at 6:51:57 PM UTC-5, Vaughn Simon wrote:
On 11/14/2015 5:14 PM, wrote:
As researchers continue to work on creating better
batteries, the logical solution all along was always
the Auxiliary Power Unit for charging.

Well yes that will work (assuming an electric drive train with a
battery) , ...as long as that APU produces significantly MORE power than
the average that you will need at the prop hub. The reason why you
would need MORE power is to make up for the losses inherent in the
generator, motor, battery, and controller.

Also, I forgot to mention that I'm a professional
designer and illustrator, formerly with Lockheed-
Martin. Within this electric airplane concept which
would sustain these very long ranges with an RTG,
is a series of conforming "mini-tanks" which encapsulate major
electrical components. Holding no more than 5 gallons
total, you top them off with liquid nitrogen. This
cryogenic sealed system effectively turns your electrical
system into a zero-resistance super conductor. Control
surfaces are best facilitated with servos and fly by
wire software.

This may sound a little exotic, but other people have
verified the plausibility and science behind it. A
home-build isn't out of the question. With generator,
super conduction, and fast charge NON-lithium batteries,
the range may really be how long you can sit in a seat.

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Here's some other guys design of the same idea, but EDFs
(electric ducted fans)are less efficient than propellers.

....superconducting machines have already achieved power densities comparable to turbine engines. To fully enable electric flight however, power densities need to improve even further, which is only possible with all-superconducting machines. We developed design concepts for revolutionary aircraft using superconducting machines for propulsion and showed that with further development in superconducting and cryocooling technologies, all within reach, superconductivity- enabled flight could be a reality...

http://www.technovelgy.com/ct/Scienc...p?NewsNum=2712

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Just for clarification here, while it would be nice to
have an RTG (especially since it takes 100 years to run
out of charge) obviously for the ordinary man and pilot
this would be difficult. Also, adherence to rules is of
course, foremost. It is however a do-able concept that
doesn't violate the law of energy conservation.

That being said, simply replace that component with a
hydrogen fuel cell. A little different, but people are
doing it and it works for an APU charger. Combined
with quick charge batteries, you'll be fine.

Lastly I want to give an illustration. If you take a
dc light bulb, a 9 volt battery, and say... 50 feet or
more of wire and make the connection, you will either
see no light, or a faint orange glow. Then if you take
that same coil of wire and drop it into a bucket of
liquid nitrogen with the 2 ends hanging out, then connect
the bulb and battery, it will burn as bright white as
the battery touching the bulb itself. This is due to
zero resistance and super conductivity.

Now, being realistic think of an airplane today with
a long wiring harness of several wires. It will be
zip tied to the frame and run through grommets at
points to prevent sheathing penetration. What if we
take that harness and run it through an insulated
metal tubing, with leak-proof ends. Imagine an insertion
point wherein you can inject liquid nitrogen. You
have now just done the same thing as in the above
illustration.

This is just one example of my design that could be
installed in your cryogenic system to achieve super
conductivity. Should the liquid nitrogen warm over an
extended period... it will harmlessly vaporize, and
you'll recharge it as needed.

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On Monday, November 16, 2015 at 6:41:09 PM UTC-5, wrote:
Just for clarification here, while it would be nice to
have an RTG (especially since it takes 100 years to run
out of charge) obviously for the ordinary man and pilot
this would be difficult. Also, adherence to rules is of
course, foremost. It is however a do-able concept that
doesn't violate the law of energy conservation.

That being said, simply replace that component with a
hydrogen fuel cell. A little different, but people are
doing it and it works for an APU charger. Combined
with quick charge batteries, you'll be fine.

https://www.youtube.com/watch?v=_Uxb8v4ylTU

.. . . . . . .

"The efficiency of this process is not limited by the thermodynamic constraints of combustion engines and consequently achieves a fuel-to-electricity efficiency two to three times higher than current engine/generator combinations.

The fuel cell does not have to be recharged once empty, as hydrogen and oxygen/air are continuously supplied to the fuel cell stack, allowing continuous operation."

http://aviationweek.com/commercial-a...pu-replacement

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http://onlinelibrary.wiley.com/doi/1...e1028/abstract